DENIS SMITH wrote:

The area rule works as long as the materials used for
the core is the same.  If the efficiency of the
materials for heat transfer is different the area rule
no longer is completely valid

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org